Bumps the verified-against commit to 774f9d3 (the RunNow/picker
double-dispatch race fix) and documents the new claim-before-create
ordering and the RunCancellationRegistry double-registration guard.
Bumps the verified-against commit to 774f9d3 (the RunNow/picker
double-dispatch race fix) and documents the new claim-before-create
ordering and the RunCancellationRegistry double-registration guard.